Improvement in dovetailing-machines



@wia/5MM N. PETERS, PHOTOMTHOGNAPHER, WASHINGTON l;

tirant Satta anni' (tithe Letters Patent No. 109,194,` dated November15, 1870.`

IMPROVEMENT IN DOVETAILING-MACHINES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern.

Be it known that I, JOHN l. FLaxnnns, of V ergennes, in the county ofAddison and State of Vermont, have invented a new and useful Machine forCutting Dovetails; and I hereby declare the follow ing to be a full,clear, and exact description thereof, reference being had to theaccompanying drawing, in which- Plate 1, figure 1 is a side view Figure2 is a top View; and

llate 2, figure 3 is an end view of the machine. Same letters refer tolike partsA in all thc figures. l

The nature of my invention relates:

First, to -the manner of arranging the cuttingchisels, which movevertically in adjustable frames, so that any angle may be eut, from aperpendicular or square cut, to the utlnost limit required fordovetailed joints. 2

Second, in the manner of moving` the horizontal shaft of the rotarycutters to give a reciprocating movement, so that the width of thedovctail mortiscs may be adjusted by the operator.

Third, in the combination of the different parts of the machine, ashereinafter described.

'In the drawing- A is the frame of the table.

A, the cross-rails, upon which are placed the plummer-bloeks A2, thatsustainthe main drivingshaft B, on which shaft are thc crank-wheel l),pulley 11, and loose and bi. l

B is the table-top, upon which is placed the standard arched frame (l,on which are fastened the chisel-flames C C, carryingr the chisel-ShanksG2 G2, into which are fixed, by set-'screws c c, the ehisels C C.

. These frames C C1 are made adjustable by means of screws cl c2, andslots for their adjustment.

lhe chisel-shanks or rods are attached to pitrnanbars b5 b, which areconnected,to,'and operated by, crank-wheel b on the main shaft.

On the table is also a horizontal shank, d, worked by a crank-wheel, di,on the end of a vertical shaft, d, which is driven bythe beveledgear-wheel .11 at its lower end, meshing with gear-wheel b on the mainshaft '13.

rlhis shaft d supported in a bracket, d', fastened to the end frame.`

The horizontal shank di* works in guides d cli fastened tothe'tablc-top.'

In the shank is the chisel d, working in connection with the verticalehisels C3 C, receiving its repulley 7;2, beveled gear-wheels bfciprocating mtion from the main driving shaft B by means of beveledgears La and b4.

On the table is placed ahorizoutal shaft, D, snpportcd in plummer-blocksE E.

At one end of shaft D is a pulley,e, driven by a belt from the largepulley E on the end of the shaft B.

At the otherend of shaft D is a socket-joint, fi, in which is inserted asmaller shaft, D, which isheld in said socket by a pin, t', insertediutoa neck of the shaft D1, through the socket on D, in the usual` way.'

Shaft Dl has a screw-thread out upon it nearly from end to end, andpasses through a standard, j, secured rigidly to the table.

On either side of said standard is a nut, 1.', fitted to the shaft Dl7which nuts, by being adjusted, serve as sto-ps to the horizontalmovements ofthe shaft.

Attire outer end of the shaft Di is jointed, vby tenon and mortise, ashort shaft or sliding bar, D", which is made tlat vertically, andpasses through the standard C, having at its outer extremity aconveniently-shaped handle, and a notch or notches on the 'lower edge,

.which are fitted to a plate ou the` standard yto secure the shaft D inany desired position.

rlhe bearings of shaft D inthe plummer-bloeks are all reduced, and haveshoulders to provide for the lateral reciprocating movement, as seen atg g.

On shaft D are4 placed any convenient number of rotary disks, F, havingdovetail or other-shaped eutters j, separated by collars f, and fastenedbya screw nut, 1:.,iittcd to t-hc thread cnt upon the shaft, as

-scen at la h.

Attached to the table, oh the iront edge, `is a feedboard, l1", fastenedtothe edge by screws having slots, so that the feed-board may be adjusted to any conv nient position to suit thc work to be done. Gauges onthev board are placed as usual, to guide the work.

On the table, under the chisels, and outside ot the standard C, isanother' feed-board, K, with its guides,

Aand a spaeing-rod for adjusting the board for the dovctails.

Operation.

lower may he applied, in any of the usual forms, either at the end ofthe shaft o1' to the pulley b1.

.Mot-ion then will be given to the chiselsshanks C2 C2 by thepitman-bars h5 1f', and, at the same time the horizontal chisel-shank dwill be put in motion by the vertical shaft l and its crank-wheel (l2.

The band from pulley E', connecting with pulley c ou the end ofshaft D,gives motion to the revolving cutters F.

lhc shaft D, being jointed by a socket to a smaller shaft D1, revolvesfreely without revolvingA D1, which,

being attached to the ber D2, is prevented from turning by the slot inthe standard C.

l. 'lhe-cliisel-frnmes (il C1, made adjustable on the arched standard G,for the purpose ot' adapting the ehisels to :my desired angle, in themanner shown and described.

2. The horizontal shaft D, with its connections Dl, provided withscrew-thread and nuts k la, and' standard f, jointed bnr D. and archedstandard O, all consnrueted and combined substantially as :md for thepurpose described.

3. rlhe combination ot' ehisels C'Z Cziind C with adjnstnblevframes C C,horizontal shaft D, awith its disks und cutters F and f2, shaft D1, andits connectionsfor moving it rec-iproeally, all substantially as and forthe purpose described.

J. P. FLANDERS.

Witnesses M. T. E. CHANDLER, W. R. SINGLETON.

